Rotary engine.



` No. 644,8i4. Patented Mar. `6, |900.

J. BRONS.

ROTARY ENGINE.

Applica-tion led July 31, 1899.)

3 Sheets-Shawl l.

(No Model.)

NVENTO? W/ T/VE SSE S.'

- AHORA/frs no. 644,8l4. Patented Mar. s, |900.

i J. Bmms.V

RUTARY ENGINE.

(Application filed July 31, 1899.) (No Model.) Y 3 Sheets-Sheet 2` Elly. Z.

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TTOHNE Y S TN: Nonms PETERS co, Pnooufno.. WASHINGTON. n. c.

Patented Mar.` 6, 1900.

Nm 644,8i4.

J. BRONS.

ROTARY ENGINE..

(Application filed July 31, 1899.)

3 sheets-sheet '3,

(No Madam' /NVENTH W/ TNE SSE S:

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p than upon the other side.

l against the piston.

, rrhh STATES PATENT rrren.

JAN BRONS, or FARMsUivi, NETuniLANns.

ROTARY ENGINE.

srEcIFIcr-irroitr formingpart or Letters rarest No. 644,814, dated Maren e, ieoo.

Serial No. 725,726. (No model.)

To all whom, t may corr/067%:

Be it known that I, JAN BRONS, a subject of Her Majesty the Queen of the Netherlands, residing at Farmsum, near Delfryl, in the Province of Groningen, Netherlands, have inventedacertain new and useful Improvement in Rotary Engines, 'of which the followingis a specification. v

This invention relates to an improvement in rotary engines. In engines of the kind having a movable part or wall in the cylinder against which the piston Works difficulties are presented in practical construction as far as the tightening and the -movement or action of this part are concerned; andthe.

object of the present invention is to produce a motor in which these difiiculties are prevented.

According to luy-invention the rotary piston, which is secured on the driving-shaft, is of an oval or eccentric cross-section and is adapted to move in a cylindrical space, and in these respects the motor does not differ from other rotary engines of this class. My arrangement of the movable part or Wall is novel, such parts being formed as tongueshaped bodies which are pressed againstthe piston and as the piston moves rock on a iixed axis or pivot. These tongue-shaped pieces are arranged in two chambers at both sides of the cylinder, and into these chambers the steam, Water under pressure, compressed air, or any other gas or liquid under pressure is introduced. The tongue-shaped pieces,which are exposed upon both sides to the pressure of the steam, lt-c., are so formed that the total pressure upon one side is greater The tongues thus are permanently pressed against the piston. From these chambers the steam enters the slide-valve case, which may be arranged at one end of the cylinder. The end of this case forms the front end of the cylinder. This front end of the cylinder is capable of being moved or displaced within the cylinder and is (owing to the steam-contact surface being larger externally than internally) also pressed A steam-tight contact between the piston and the cylinder is thus insured.

A further novel feature in this improved rotary engine is the steam-distributing de `vice---that is to say, the arrangement in theJ slide-valve case of two reversible slides, with theiraccessory parts, so that by means of a hand-lever the slides can be moved and the direction of movement of the motor can be altered or the steam be cut off. The steam from theslide-valve case passes through narrow conduits into the cylinder. The inner space of the two slides communicates with the steam-discharge conduit, which terminates in a chamber arranged around the cyl'- inder and facing the tongue-casing. From this chamber the steam is discharged.

One form of my invention is illustrated in the accompanying drawings, in which- Figure l .represents a horizontal section on line of Fig. 4; Fig. 2, a section on lineyy' of Fig. 4; Fig. 3, a section on line e zof Fig. 4. Fig. 4 is a vertical section through the motor. Fig. 5 is an elevation, partly in section, looking toward the slide-face, the motor being turned on one side; and Fig. G, an elevatio'n of the slide-valve case with the motor in the same position.

The cylinder 1 is preferably formed in halves7 as shown in Fig. 4. The upper half carries the tongue-chambers 2,with the steamadmission port or nozzle 3, all being integrally formed as a casting. The lower half contains a chamber 4, like a jacket, to which the steam-discharge port or nozzle 5 is connected, and on this half flanges 6 are provided, which serve for fixing the motor. At the rear end the cylinder is closed by a coverplate 7 and at the front endby a movable flanged sleeve 8, forming part of the slidevalve case 25. The sleeved part of this extends around the motor-shaft 9 and projects through a stuffing-box 10 in the front end cover 11. The flanged sleeve S is tightened in the interior of the cylinder by means of a packing 12 and a suitable reinforcing plate or washer 13 bolted thereto. The steam-pressure on the outside of this flanged sleeve keeps same tightly pressed againstthe piston. The

These tongues 16 are ICO made in the form of hooks bent at about right angles and equal in width to that of the piston. The portion of the hook which projects into the cylinder is made semicircular, with its pivot 17 as a center, so that it may easily move in openings in the cylinder-walls 19 between packings 18, while it may also be easily tightened by means of such packings. The cylinder-space thus is separated in a steamtight manner from the tongue-chambers.

In the cylinder-walls 19 are four passages 20, 21, 22, and 23, arranged parallel with the axis of the cylinder. These passages serve for the admission and the discharge of the steam and communicate with the cylinderspace by means of a series of smaller passages 24:. These passages 24 are arranged over the whole width of the cylinder (see Fig. 1) and have their discharge opening between the packing 18 and the cylinder both above and below the tongues.

When the motor rotates in the direction indicated by the arrow, Fig. 4, steam enters through the passages 22 and 21 and is exhausted or discharged through the opposite passages 2O and 23. If the motor rotates in the opposite direction, the passages change their functions. The four passages extend to the slide-face 26, Fig. l-thatis to say, into the slide-valve chamber 25-and the latter on its part communicates with the tongue-chambers 2 by means of passages 27, Fig. 3. In this manner the slide-valve chamber is permanently supplied with new steam.

Upon the slide-face 26, before mentioned, two hollow or chambered slides 28 are adjustably arranged. They are semicircular in shape, as seen in Fig. 5, and are located diametrically opposite each other within the circular slide-valve chamber 25 and are connected with each other or carried by a flanged head 29, centrally situated around the sleeve portion of the iianged sleeve 8, before referred to. The connection between the slides 28 and the flanged head 29 is effected by pins 30, forming pivots. One of these pivots is extended and engages with a flat frame or link 31, as shown in Fig. -1, which rests upon the flanged head 29. This frame or link 31 is rigidly connected with a spindle 32, passing through a stuffing-box 33 and projecting from the slide-valve chamber 25, so that it can be turned by a handle 34, Figs. 1 and G. lVhen the slides 28 are in their middle position, the four passages 2O to 23 all communicate with the inner hollow space of the slides and through a passage 35, Figs. 1, 5, and 6, with the exhaust-chamber 4. lf now through the medium of the frame or link 31 and flanged head 29 the two slides are turned into the position indicated in Fig. 6, the passages 21 and 22 are opened for the admission of steam, while the passages 2O and 23 remain in communication with the exhaust chamber by means ofthe hollow space of the slides, so that the motor will rotate in the direction of the arrow. If, on the contrary, the handle is turned to the left, Fig. 6, the opposite passages 2O and 23 will be opened for the admission of steam, while the passages 21 and 22 are put in communication with the exhaustchamber. The movement then takes place in the opposite direction. When the handle and the slides respectively occupy their medium position, both passages are closed to the admission of steam, and the motor is consequently stopped. It is thus evident that as the piston moves steam is admitted during one half-revolution. The piston then itself cuts off the steam, passes the tongues, while pressing them back gradually, and simultaneously the exhaust-passage upon the other side opens. The same process takes place upon the other side. The steam thus works Without expansion. If the expansive force of the steam is desired to be further utilized, the exhaust-steam may be conveyed into a lowpressure cylinder of larger dimensions mounted on the same shaft and so that the piston in this cylinder is displaced relatively to the high-pressure piston by ninety degrees.

If it is desired to work with expansion in one cylinder, then the admission of steam into the passages 2O and 23 or 21 and 22 must be effected by valves directly actuated by the motor itsel-f.

The advantages of this improved apparatus are great simplicity and economy. No loss of steam occurs, because all the moving parts are entirely surrounded by steam. The distribution of the steam is very simple. The piston does everything itself, and there are no distributing or controlling mechanisms connected with the motor. The engine is started or reversed by turninga handle. Instead of using steam for working the motor compressed air, Water under pressure, and the like may also be employed.

1. In a rotary engine and in combination, a cylinder, an eccentric piston, swinging abut* ments or tongue-shaped parts coacting therewith, a loose end to the cylinder, a packing for same, a slide-valve chamber in which such loose end is situated and means for supplying and removing duid-pressure to and from such slide-valve chamber, the loose end being so proportioned that pressure may be exerted upon it to press it against the piston greater than the pressure outward from the cylinder,` substantially as described.

2. In a rotary engine and in combination a cylinder, an eccentric piston located therein, swinging abutments coacting with said piston, a iianged sleeve forming one end of said cylinder, a stuffing-box through which the sleeved part passes, the main shaft, which the sleeved part surrounds, and a fluid-pressure chamber on the side of the iianged part opposite to the cylinder the flanged part being so proportioned that pressure may be exerted on the lian ged part to press it against the piston greater than the pressure outward from the cylinder substantially as described.

IOO

IIC!

swinging abutments coacting therewith, of

the slide-valve chamber 25, semicircnlar re- Ciaa versing-slides 28 28 a movable iianged head pivoted to same, alink 3l pivoted to said head; a stuffing-box on the chamber 25, a rod passing through such stuffing-box and attached to the link, and a handle for the rod whereby 2o the latter maybe moved to move the link .and connected parts, substantially as described.

In testimony'whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

.IAN BRONS.

Witnesses:

RIENK BORGER, DERK FEIKEN. 

